Catch for a photographic-plate holder



AUNITED STATES PATENT OEETCE.

HENRY C. EDDY, OF JERSEY CITY, NEW JERSEY.

CATCH FOR A PHOTOGRAPHlC-PLATE HOLDER.

Specification forming' part of Letters Patent No. L14, ll :lated September 13, ISG-i.

Be it known that I, HENRY C. EDDY, ot' manner. Its lid B is connected to theframe Jersey City, in the county ot' Hudson and State A by hinges a, and it is closed by a springof New Jersey, have invented a new and Imcatch, C. llhis catch is made with double proved Plate-Holder Catch; and I do hereby spring-jaws, l; b, which have their fulcrum on declare that the following is a tull, clear, and pivots c c, and are subjected to the action ot' exact description thereof, which will enable a spring', d, which forces their shanks apart, others skilled in the art to make and use the and consequently throws the points ot' the same,referencebeing had to the accompanyjaws together. These jaws catch over the ing drawings, forming part of this speciticaconical head ot`a stud, c, which forms ashoul- T0 all whom, t may concern: I graphic camera constructed in the ordinary tion,in whichl der, and is so formed that when the lid is Figure 1 is a face view of my invention. l closed the twojaws strike the inclined planes Fig. 2 is a horizontal section of the same. l of the same and are forced open until they Similar letters of reference indicate like pass the lower edge ot' said head, when they parts. y close round the shank of the stud and hold This invention relates to an improvement l the lid iirmly closed. rIbis double catch is in the catch or latch which closes the lid otl not liable to open spontaneously, for if one the plate-holder ot` a photographic camera, l ofthe shanks is accidentaly brought in conand which is so arranged that it is not liable l tact with the body of the operator or with to open accidentally. l some other thing, whereby the same should be Plate-holders of the ordinary construction l forced back, thus causing` that jaw to open, are provided with a simplelever-catch, calcul the other jaw still holds the lid iirmly closed, lated to close the lid and keep it closed from and no light is enabled to find access to the the time the plate has been inserted until it picture. arrives in the dark-room. The slide in front The two jaws, being made to open'in oppoot the plate, which is pushed down as soon site directions, are not liable to be thrown as the picturehas been taken, is not liable to open simultaneously by a mere accident, and open spontaneously as long as the plateat the same time they are easily opened and holder is held in an upright position; but the closed, so that the operator has no trouble in lid, being closed by an ordinary latch or catch, opening the lid in the dark room. may open if by some accident the catch be- I claim as new and desire to secure by Letcomes entangled with the garment of the opters Patenterator or if it strikes against something, and The double catch C, consistingof two springit' it opens only :instantaneously the smallest jaws b b, and operating in combination with ray of light admitted to the plate daikens the conical-headed stud c and hinged lid B, in the picture or spoils the effect, and sometimes the manner and for the purpose substantially the operator is unable to account for the reaas herein shown and described. son. To avoid this difficulty and to arrange i T u r `i n r the Catch so nieta win hold without fan and Hm M J' Lmperfectly secure the lid of the plateholder is Witnesses: the object or my invention. THEO. TUscH,

A represents the plate-holder ot a photol M. M. LiVtNGs'roN. 

